Nikon VM720 7.4V Replacement Battery 2600mAh Li-ion

NiKon VM720 / VM7200 — 7.4V Li-ion Replacement Battery

This 7.4V, 2600mAh (19.24Wh) lithium-ion cell replaces the original battery in the NiKon VM720 and VM7200 digital cameras. It slots into the same battery compartment and connects to the same BMS handshake points as the factory cell. Voltage and capacity match OEM spec exactly — no modification needed.

• VM720 and VM7200 compatibility: Both models share the same battery bay dimensions, connector pinout, and BMS communication protocol. That common platform means one replacement cell covers both cameras without any adapter or wiring change.
• Bench tested on actual hardware: We ran a full charge-discharge cycle on this cell and monitored BMS handshake confirmation, charge acceptance, and cutoff at the correct low-voltage threshold. The protection circuit triggered cleanly at the expected floor voltage — no false trips during normal draw.
• First-cycle calibration on NiKon cameras: Complete one full charge through the camera body or OEM charger before shooting. Some NiKon BMS firmware maps the battery-remaining display against a calibrated discharge curve — skipping this step can cause the indicator to read inaccurately for the first several cycles.

Why the VM720 battery percentage jumps erratically after fitting a new cell

The VM720 maps its battery-level indicator to a voltage-threshold table built from the original cell's discharge curve. A new cell — even one at correct spec — discharges along a slightly different curve until it's been cycled a few times. The camera reads voltage at fixed intervals and translates that to a percentage; if the curve doesn't match what the firmware expects, the display can jump from 80% to 40% with no warning. Run two or three full charge-discharge cycles and the indicator stabilises as the BMS re-maps to the new cell's actual curve.

Camera body warm and battery draining faster during sustained video recording

Video mode on the VM720 and VM7200 stacks sensor readout, image processing, image stabilisation, and continuous autofocus draw simultaneously — all pulling from the same 7.4V rail. That combined load is significantly higher than still shooting. Heat building in the camera body is the processor and sensor dissipating that sustained current draw, not a battery fault. If the cell drains noticeably faster in video than in stills, that's expected behaviour — factor in the higher current draw when planning a shoot session.